package com.bootdo.common.utils;

import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;

public class ExcelUtils {
	
	public static Workbook getWorkBook(MultipartFile file) {
        //获得文件名
        String fileName = file.getOriginalFilename();
        //创建Workbook工作薄对象，表示整个excel
        Workbook workbook = null;
        try {
            //获取excel文件的io流
            InputStream is = file.getInputStream();
            //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
            if (fileName.endsWith("xls")) {
                //2003
                workbook = new HSSFWorkbook(is);
            } else if (fileName.endsWith("xlsx")) {
                //2007 及2007以上
                workbook = new XSSFWorkbook(is);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return workbook;
    }
	 public static String getCellValue(Cell cell) {
	        String cellValue = "";
	        if (cell == null) {
	            return cellValue;
	        }
	        //判断数据的类型
	        switch (cell.getCellType()) {
	            case Cell.CELL_TYPE_NUMERIC: //数字
	                cellValue = stringDateProcess(cell);
	                break;
	            case Cell.CELL_TYPE_STRING: //字符串
	                cellValue = String.valueOf(cell.getStringCellValue());
	                break;
	            case Cell.CELL_TYPE_BOOLEAN: //Boolean
	                cellValue = String.valueOf(cell.getBooleanCellValue());
	                break;
	            case Cell.CELL_TYPE_FORMULA: //公式
	                cellValue = String.valueOf(cell.getCellFormula());
	                break;
	            case Cell.CELL_TYPE_BLANK: //空值
	                cellValue = "";
	                break;
	            case Cell.CELL_TYPE_ERROR: //故障
	                cellValue = "非法字符";
	                break;
	            default:
	                cellValue = "未知类型";
	                break;
	        }
	        return cellValue;
	    }
	 /**
	     * 时间格式处理
	     *
	     * @return
	     * @author Liu Xin Nan
	     * @data 2017年11月27日
	     */
	    public static String stringDateProcess(Cell cell) {
	        String result = new String();
	        if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式
	            SimpleDateFormat sdf = null;
	            if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
	                sdf = new SimpleDateFormat("HH:mm");
	            } else {// 日期
	                sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
	            }
	            Date date = cell.getDateCellValue();
	            result = sdf.format(date);
	        } else if (cell.getCellStyle().getDataFormat() == 58) {
	            // 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)
	            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
	            double value = cell.getNumericCellValue();
	            Date date = org.apache.poi.ss.usermodel.DateUtil
	                    .getJavaDate(value);
	            result = sdf.format(date);
	        } else {
	            double value = cell.getNumericCellValue();
	            CellStyle style = cell.getCellStyle();
	            DecimalFormat format = new DecimalFormat();
	            String temp = style.getDataFormatString();
	            // 单元格设置成常规
	            if (temp.equals("General")) {
	                format.applyPattern("#");
	            }
	            result = format.format(value);
	        }

	        return result;
	    }
}
